Twelve questions across the whole course. The last three combine lessons.
Pick an answer, and the question marks itself. For a question that you answer in your own words, think of your answer first. Then show our answer and say whether you had it. Nothing is saved or sent.
-
Question 1: A friend says their GIA report proves the ring is worth a certain price. What's wrong?
Show the answer
b: A report is not an appraisal (lesson 1).
-
Question 2: A round's measurements read 6.40 – 6.46 × 3.98 mm. Which part tells you the stone is slightly out of round?
Show our answer
The two diameters, 6.40 and 6.46 mm: the minimum and maximum differ (lesson 2).
Did you have it? -
Question 3: What does an asterisk after the color grade on a GIA report mean, and where do you look next?
Show our answer
A detected color treatment. Look in Comments, which explains it (lessons 3 and 8).
Did you have it? -
Question 4: Which of these diamonds can get a GIA cut grade?
Show the answer
b: GIA grades cut only on standard round brilliants in the D-to-Z range (lesson 3).
-
Question 5: On an IGI report, what does the comment "Ideal Cut Round Brilliant" tell you?
Show our answer
The cut grade is Excellent, and every proportion falls inside IGI's narrower Ideal band (lesson 4).
Did you have it? -
Question 6: A round has Excellent proportions, Excellent polish and Good symmetry. What's the best GIA cut grade it can get?
Show the answer
b: Good symmetry caps the cut grade at Very Good (lesson 5).
-
Question 7: A report says "Fluorescence: None". What range does that cover?
Show our answer
Anything from indiscernible to very faint, under long-wave UV (lesson 5).
Did you have it? -
Question 8: Which GIA report lists up to four clarity characteristics in words instead of a plot?
Show the answer
b: The Dossier, which also carries a laser-inscribed report number (lesson 6).
-
Question 9: A diamond has been fracture filled. What does GIA issue, and what does IGI do?
Show our answer
GIA issues an Identification Report, not a grading report. IGI issues no full grading report for non-permanent treatments (lesson 8).
Did you have it? -
Question 10: A report for a 1.00 ct round gives 6.48 – 6.50 × 4.00 mm. The stone in your hand is 1.00 ct but measures 6.67 mm across. What can you conclude, and what would you check next?
Show our answer
The report doesn't belong to that stone: a given cut in a given material has one size at one weight. A 3% wider stone at the same weight could be a different material, such as moissanite. Check the inscription and Report Check, and have the stone tested (lessons 2 and 8).
Did you have it? -
Question 11: A Dossier lists "Cut: Excellent", "Polish: Very Good", "Symmetry: Excellent", "Inscription: none". Which line is suspicious, and why?
Show our answer
"Inscription: none": a Dossier always carries its report number laser-inscribed on the girdle (lessons 2, 6 and 9).
Did you have it? -
Question 12: Two listings: a GIA "Triple Excellent" round and an IGI "Excellent-Ideal" round. Do they mean the same thing? And does either one tell you that the stone earned an AGS Ideal light performance grade?
Show our answer
No. Triple Excellent means Excellent cut, polish and symmetry on GIA's scale. Excellent-Ideal is IGI's Excellent with the Ideal comment for a narrower band. Neither is an AGS Ideal light performance grade. That grade is on a separate supplement, which GIA issues only for stones that reach AGS Ideal 0 (lessons 4 and 5).
Did you have it?
Your score
One lesson at a time
Each lesson has five questions. The questions and the answers to pick from come in a new order every time you start.